Tartaric acid refers to metoprolol tartrate. Metoprolol succinate is better at controlling blood pressure, while metoprolol tartrate has some of its own advantages in controlling arrhythmias. Metoprolol is a selective beta 1-adrenergic receptor antagonist and is commonly used in the treatment of coronary artery disease, heart failure, and hypertension. There are two dosage forms of metoprolol, namely metoprolol succinate and metoprolol tartrate. Both are indicated for hypertension, angina pectoris, premature ventricular contractions, and other arrhythmias, and are contraindicated in patients with asthma, poor peripheral circulation, severe heart failure, and atrioventricular block, with some patients experiencing bradycardia, hypotension, and other adverse effects. Metoprolol succinate has a lower solubility and can be prepared as an extended-release agent, with a smoother drug release and a smoother antihypertensive effect. Metoprolol tartrate, on the other hand, has a higher solubility, can only be prepared as flat tablets, has a shorter half-life, and has certain advantages of its own in controlling arrhythmia. Metoprolol is a prescription drug and needs to be administered under a doctor’s supervision, and should not be taken or discontinued on its own.